MD
Mary Dugan — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Mary Dugan across the 1930 and 1940 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1909), then head of a 9-person household.
Age 21
b. ~1909
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Dugan |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Canada English |
| Mother's Birthplace | Northern Ireland |
| Additional Details | |
| Occupation | Weigher |
| Industry | Smoke House |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Weigher |
| Township / Ward | Boston City |
| Est. Birth Year | ~1909 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Madeline Dugan | Daughter | — | 15 | ~1915 |
| Bernard Dugan | Son | — | 5 | ~1925 |
| Mary Dugan | Daughter | — | 21 | ~1909 |
| Gertrude Dugan | Daughter | — | 9 | ~1921 |
| Thomas Dugan | Head | — | 49 | ~1881 |
| Joseph Dugan | Son | — | 17 | ~1913 |
| Mary Dugan | Other | — | 40 | ~1890 |
| Thomas Dugan | Son | — | 21 | ~1909 |
| Owen Dugan | Son | — | 12 | ~1918 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 21
Suffolk, Massachusetts · implied b. ~1909 — 9 household members
| Surname | Dugan |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Canada English |
| Mother's Birthplace | Northern Ireland |
| Occupation | Weigher |
| Industry | Smoke House |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 31
Suffolk-County, Massachusetts · implied b. ~1909 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duggan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Chelsea City |
| 1935 Residence (County) | Suffolk |
| Occupation | Table |
| Industry | Paper Cups |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 144 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Dugan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dugan
Daughter · 1930 · age 21 · b. ~1909 · Massachusetts
★ You are viewing this record
Sibling
Madeline Dugan
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Dugan
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Owen Dugan
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Dugan
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Dugan
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Dugan
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Suffolk, Massachusetts
Open full size
1930 US Federal Census — Suffolk, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel946:0820)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas J. Dugan | 49 | Head | Fish Cutter | Massachusetts |
| 2 | Mary A. Dugan | 40 | Wife-H | — | Northern Ireland |
| 3 | Thomas J. Jr. Dugan | 21 | Son | Wrapper | Massachusetts |
| 4 | Mary A. Dugan THIS PERSON | 21 | Daughter | Weigher | Massachusetts |
| 5 | Joseph T. Dugan | 17 | Son | Weigher | Massachusetts |
| 6 | Madeline M. Dugan | 15 | Daughter | — | Massachusetts |
| 7 | Owen R. Dugan | 12 | Son | — | Massachusetts |
| 8 | Gertrude A. Dugan | 9 | Daughter | — | Massachusetts |
| 9 | Bernard R. Dugan | 5 | Son | — | Massachusetts |
| 10 | Edward Troy | 46 | Head | Laborer | Northern Ireland |
| 11 | Anne Troy | 43 | Wife-H | House Cleaning | Northern Ireland |
| 12 | Mary A. Troy | 22 | Daughter | Wrapper | Massachusetts |
| 13 | William Troy | 18 | Son | Delivery Man | Massachusetts |
| 14 | Helen Troy | 13 | Daughter | — | Massachusetts |
| 15 | Edward J. Troy | 12 | Son | — | Massachusetts |
| 16 | Thomas Troy | 9 | Son | — | Massachusetts |
| 17 | Anna Troy | 7 | Daughter | — | Massachusetts |
| 18 | James Troy | 5 | Son | — | Massachusetts |
| 19 | Carmelo Blanca | 57 | Head | Laborer | Italy |
| 20 | Marie Blanca | 47 | Wife-H | — | Italy |
| 21 | Charles Blanca | 28 | Son | Delivery Man | Italy |
| 22 | Josephine Blanca | 19 | Daughter | Packer | Massachusetts |
| 23 | Catherine Blanca | 17 | Daughter | Buffer | Massachusetts |
| 24 | Anna Blanca | 15 | Daughter | — | Massachusetts |
| 25 | Bennett Blanca | 12 | Son | — | Massachusetts |
| 26 | Frances Blanca | 10 | Daughter | — | Massachusetts |
| 27 | Florence Blanca | 8 | Daughter | — | Massachusetts |
| 28 | Joseph Blanca | 6 | Son | — | Massachusetts |
| 29 | John J. Devlin | 69 | Head | Inspector | Northern Ireland |
| 30 | Alice Devlin | 68 | Wife-H | — | Northern Ireland |
| 31 | William Gottwald | 55 | Head | Fireman | Massachusetts |
| 32 | Mary E. Gottwald | 34 | Wife-H | — | Ireland |
| 33 | Alice Gottwald | 9 | Daughter | — | Massachusetts |
| 34 | Grace Gottwald | 7 | Daughter | — | Massachusetts |
| 35 | Mary Gottwald | 6 | Daughter | — | Massachusetts |
| 36 | Rita Gottwald | 4 | Daughter | — | Massachusetts |
| 37 | Frederick C. Gottwald | 32 | Head | Fireman | Massachusetts |
| 38 | Grace M. Gottwald | 27 | Wife-H | — | Massachusetts |
| 39 | Eleanor T. Gottwald | 6 | Daughter | — | Massachusetts |
| 40 | George J. Gottwald | 4 | Son | — | Massachusetts |
| 41 | Irene Gottwald | 1 | Daughter | — | Massachusetts |
| 42 | Victor Ragalevsky | 55 | Head | Foreman | Lithuania |
| 43 | Frank Ragalevsky | 18 | Son | Butcher | Massachusetts |
| 44 | Victor Ragalevsky | 17 | Son | Errand Boy | Massachusetts |
| 45 | Anthony Ragalevsky | 14 | Son | — | Massachusetts |
| 46 | Stanley Ragalevsky | 12 | Son | — | Massachusetts |
| 47 | Helen Ragalevsky | 9 | Daughter | — | Massachusetts |
| 48 | Michael Jakubowski | 28 | Head | Presser | Lithuania |
| 49 | Anna Jakubowski | 24 | Wife-H | — | Massachusetts |
| 50 | Virginia Jakubowski | 1 | Daughter | — | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)